How can we make Microsoft Teams better?

Use well-known names (short codes) for emoticons/emoji

Amongst others, Github and Slack use a common naming schema for emoji. Teams has a different naming schema for at least part of the emoji set, for example:
":ok_hand:" - not present in Teams
":disappointed:" - can't even be typed, as soon as ":d" is typed it becomes a Skype emoticon

Please use a common naming convention that a lot of people have already gotten used to.